189700668 has 18 divisors (see below), whose sum is σ = 479521224. Its totient is φ = 63233544.

The previous prime is 189700663. The next prime is 189700673. The reversal of 189700668 is 866007981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (189700663) and next prime (189700673).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189700661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2634696 + ... + 2634767.

It is an arithmetic number, because the mean of its divisors is an integer number (26640068).

Almost surely, 2^189700668 is an apocalyptic number.

189700668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189700668 is an abundant number, since it is smaller than the sum of its proper divisors (289820556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189700668 is a wasteful number, since it uses less digits than its factorization.

189700668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269473 (or 5269468 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 189700668 is about 13773.1865593987. The cubic root of 189700668 is about 574.5876494147.

The spelling of 189700668 in words is "one hundred eighty-nine million, seven hundred thousand, six hundred sixty-eight".